Saw jointer and gage.



, Pat

C. CDDNNERI ented lune 2 ,`|902.

SAW JOINTEB AND GAGE.

(Application led Nov. 23, 1901.)

(No Mpdel.) l

flttonnu;

Ii TtR A lNGT U c UTED STATE-S PATENT OFFICE.

CHARLY MCDONNER, OF VVAUSAUKEE, VISOONSIN, ASSIGNOR TO JOSEPH HRBAOEK,OF BESSEMER, MICHIGAN.

SAW JOINTER AND GAGE.

SPECIFICATION forming part of LettersPatentNo. 703,348, dated .T une 24,1902. Application filed November 20, 1901. Serial N- 83,033. (No model.)

To @ZZ whom, it may concern:

Be it known that I, CHARLYMCDONNER, a citizen of the United States,residing at Wausaukee, in the county of Marinette and State ofWisconsin, have invented a new and useful Saw Jointer and Gage, of whichthe following is a specification.

The present invention relates to saw jointers and gages; and the objectthereof is to to provide a simple instrument of this character which maybe adjusted to the different sizes and styles of saws to be operatedupon.

The different sizes of crosscut-saws that the ordinary gage now incommon use can operate upon are limited for the following reasons: Inthe iirst place,'in this class ofl saws the curve of the cutting edge isnot uniform and it is always at least desirable to out both of a pair ofraker-teeth simultaneously and at zo the same time protect the Vadjacentcutters. Now on a small saw the teeth are located closer together thanon a large one, and as the gage should rest upon the cutting-teethlocated on opposite sides of the rakers to be operated upon, so thatboth rakers will have an equal portion exposed to the cutting action, itwill be evident that the gage-socket of an instrument that will justspan the rakerteeth of a large saw will be large enough to 3o receivenot only the raker-teeth, but also several cutting-teeth of a small one.In like manner the socket of j a small gage that will be large enough toreceive the raker-teeth of a small saw will not nearly span those of 3 5larger sizes.

One of the important features of the invention /resides in theconstruction of a gage which can be extended and contracted, so that itcan be applied to and operated upon 4o various kinds and sizes of sawshaving teeth spaced unequal distances apart.

A further feature relates to means which permit of the raising andlowering of the gage-plate without regard to the extension of 4 5 thegagebody,which extension does not therefore interfere with theadjustment of the plate.

A stillfurther feature relates to novel mechanism for adjusting andlocking the gage- 5o plate and :in such other details as are hereinafterset out more fully.

In the accompanying drawings the preferred embodiment of the inventionis illustrated and the construction and operation thereof Vis fullydescribed in the following specification.' The invention is, however,not to be limited to the specific form shown, but is open tosuch changesand modifications as the appended claims will cover.

In the drawings, Figure 1 is a perspective 6o view of a saw jointer andgage embodying the present invention. Fig. 2 is a vertical longitudinalsectional View through the same. Fig.` 3 is a vertical transversesectional view taken on the line a: a; of Fig. 2, and Fig. 4 is 65 ahorizontal sectional view taken on the line "y y ofl Fig. 2.

Similar numerals of reference designate corresponding parts in all thefigures ofthe drawings.

The ubody of the instrument is made up of two sections,(designated,respectively,10 and 11,) which sections are arrangeddn alinement and areslidablyconnected at their inner ends, so as to be movable toward andfrom each other. To this end the sectional body 10 is provided at itsinner edge with a projecting tongue 12, that overlaps the section 11,and is slidably mounted in a channel 13 in said section. The tongue 12is provided with a lon-'8o gitudinal `slot 14, and a holding screw 15passes through said slot and is threaded into the section 11, wherebythe tongue may be held against movement in the channel 13. The adjacentedges of the two sections are connected at their upper ends by a pin 16,slidably mounted in alined sockets 17 and normally held against movementin either direction by set-screws 18, threaded into the walls of thesections and bearing againstsaid 9o rod. The body is provided on oneface intermediate its side edges with a longitudinallydisposed rib 19,forming an abutment for a jointer-iile 20, which file is held in placeby brackets 2l, either secured to or forming an 95 integral part of therib 19 and provided with depending terminals 22, having set-screws 23,that bear against the outer edge ofthe file, the inner edge of said filefitting in a groove 24, located just beneath therib ,19-` A longilootudinal flange 25 projectsfrom the opposite side of the upper edge ofthe body, this iiange being broken by the usual gage-plate socket 26,half of said socket being preferably located in one section and half inthe other, the ends of the socket constituting guide-shoulders, that aremovable toward and away from each other when the sections are relativelymoved. In this socket is mounted a gageplate comprising independentsections 27, which are arranged in overlapping relation. In the formshown the overlapping portions of the sections 27 are cut away andinterlock, so that the plate as a whole presents a smooth uppersurface.One of these sections is prei"- erably provided with a projectingportion 28, so that said section extends across the entire socket. Eachof the sections 27 is mounted independently of the other upon -one' ofthe body-sections and has separate and independent adjusting mechanism.As the mechanism for both is similar in all respects, only that employedfor one need be described. The section is provided with a dependingshank 29, that is slidably mounted in an opening 80, made forfthepurpose, and is provided on one face with a rack 31. An operating-stem32, journaled in the upper end of the body-section, is provided at itsinner end iwith teeth 33, that mesh with the rack 3l, while its outer orexposed end is channeled, as at 34, to receive a screw-driver or similaractuating device. A set-screw 35 bears against the opposite side of theshank 29 to normally hold the same against movement.

'The application of the device will be obvious to those skilled in theart. When a saw is to be jointed, the jointer is placed upon the samewith the file 2O bearing upon its teeth, which can be'jointed in theusual manner. When the instrument is to be used as a gage for theraker-teeth, it is supported by means of the fiange 25 upon the upperends of the cutting-teeth and the gage-plate is adjusted to the desireddistance below the'upper edge of the body, or, in other words, the depthto which the teeth are to be cut. If the teeth are spaced at distancestoo far apart for the proper application of the file, the bodysectionsare separated by loosening the holding-screws 15 and 18 and sliding saidsections apart, thus broadening the iile-guide socket.

' In like manner the socket may be narrowed by sliding the body-sectionstoward each other. This, it will be observed, does not interfere withthe adjustment of the gageplate, as each section is independentlyoperated and held. By this construction it will therefore be seen thanan exceedingly useful improvement has been made in instruments of thischaracter in that provision is made for the adjustment of the same tomeet the requirements for various classes and kinds of work.

From the foregoing description itIis thought that the construction,operation, and many advantages of the herein-described invention will beapparent to those skilled in the art without further description, and itwill be understood that various changes in the size, shape, proportion,and minor details of construction may be resorted to without departingfrom the spirit or sacrificing any of the being movable toward or fromeach other upon the relative movement of the sections. 3. An instrumentof the class described comprising sections slidably connected andmovable longitudinally upon each other, eachof said sections having afile-guide shoulder, said shoulders being movable toward or from eachother on the movement of the sections, and means for holding thesections against relative movement.

4. An instrument of the class described, comprising sections arranged in.alinement and slidably connected at their inner ends, file-guideshoulders carried by the sections, and movable toward and from eachother upon the relative movement of said sections, saw-positioningdevices carried by the sections and located outside of the shoulders,and means carried by one section and engaging the other to hold saidsections against relative movement.

5. An instrument of the class described, comprising slidably-associatedsections arranged in alinement, one of said sections having a tonguethat overlaps the other section and is provided with a longitudinalslot, and a screw passing through the slot and engaging the adjacentsection to hold said sections against relative movement, said instrumenthaving a transversely-disposed le guide socket, a portion of which islocated in each section.

6. In an instrument of the class described, a body, a gage-plate mountedupon the body and comprising sections movable toward and from eachother, and guide-shoulders located at the outer ends of the gage-plateand movable toward and from each other.

7. In an instrument of the class described, a body ha-ving an eXpansibleand contractible `tile-guide socket, and an expansible and contractiblegage-plate mounted upon the body in the socket thereof.

8. In an instrument of the class described, a body comprising sectionsmovable toward and from each other and having coacting guide-shouldersVmovable therewith, and a gage-plate located between the guide-shouldersand comprising sections, one of said gage-plate sections being mountedon each body-section and movable therewith.

'IOO

IIO

9. In an instrument of the class described, a body, an expansible andcontractible gage plate carried by the body and comprising separatesections, and means for elevating and depressing each sectionindependently of the other.

10. In an instru ment ofthe class described, an expansible andcontractble body having an eXpansible and contraotible file guidesocket, a gage-plate carried by lthe body and located in the socketthereof, said gage-plate comprising separate sections, each sectionhaving a stem that :is slidably mounted upon the body, and operatingmeans-engaging said stems to move the same and thereby elevate ordepress the sections.

Il. In au :instrument of the class described, a body comprising sectionsmovable toward and from each other, a gage-plate comprising separatesections mounted upon and movable with the body-sections, and meanscarried by each body-section and engaging the gagesection carriedthereby to elevate and depress the same.

12. In an instrument of the class described,

a body comprising sections movable toward i H. G. LAUN, J osEPH HRBACEK.

